Hi! I'm Tay, backend dev and hobbyist security researcher from Mataró, Barcelona. I'm co-founder and CTO at Intake, a startup inside Lanzadera, where I lead the backend, infra, and AI, mostly in Python. I also build and contribute to open source whenever I get the chance.
This is where I write about it.
Claude Haiku 5.5 thinks by default, and the obvious migration move is to turn that off. I ran 960 support conversations to see what it costs. With thinking off, the agent skipped a quarter of the handoffs it should have made. With thinking on at the lowest effort, none.
In May I wrote that Celery was the safe default and migrated our backend to it. Three months later Celery broke our async code in production, and we replaced it with the Rust-core queue I'd been building on the side. This is what that cost, and what it taught the queue.